Electric-arc lamp



2 Sheets--Sheet 1.

(No Model.)

R M. HUNTER. ELECTRIC ARC LAMP.

Patented June 13, 1893.

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AHed

(No Model.) 2 Sheets-Sheet 2.

R. M. HUNTER.

ELECTRIC ARC LAMP.

No. 499,676. Patented June 13, 1893.

we Nkmms PETERS co. PHOTO-L|Y UNITED STATES PATENT OFFICE.

RUDOLPH M. HUNTER, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THETHOMSON-HOUSTON ELECTRIC COMPANY, OF CONNECTICUT.

ELECTRIC-ARC LAM P.

SPECIFICATION forming of Letters Patent No. 499,676, dated June 13,1893.

Serial No. 467,988. (No model.)

To all whom it may concern:

Be it known that I, RUDOLPH M. HUNTER, of the city and county ofPhiladelphia and State of Pennsylvania, have invented an Improvement inAre Lamps,of which the following is a specification.

My invention has reference to are lamps, and consists of certainimprovements which are fully set forth in the following specificationand shown in the accompanying drawings which form a part thereof.

This application, Case No. 245, com prehends improvements upon thatclass of arc lamps known as double carbon lamps and sometimes called allnight lamps from the fact that they have two sets of carbons which areconsumed in pairs, one set being brought into operation after theconsumption of the other set. In the common form of lamps of thisdescription it has been customary to provide two sets of carbon holderseach movable independently of the other and combined with regulatormechanism and independent feeding devices adapted to bring the saidindependent carbon holders into operation successively, that is to say,to feed one carbon holder until its carbon is completely consumed, andthen bring into feeding operation the second carbon holder. In all ofthose cases there were two independent feeding devices for the carbonholder rods, that is to say, one for each rod.

In carrying out my invention I dispense with the duplicate carbonholders, duplicate rods, and duplicate feeding devices, and insteadarrange both of my movable carbons in a single holder frame carried by asingle rod operated bya single feeding device, and combine therewith,suitable means to raise the carbon holder after one set of carbons hasbeen fully consumed, rotate it upon its axis to bring the second set ofcarbons into operative position, and then permit the further action ofthe regulator to regulate the consumption of the second set of carbons.This construction I have found in practice excellently adapted to thepurpose.

It is quite evident that the carbon holders may be shifted relatively byvarious modifications of my invention. Hence my improvement may bebroadly stated as comprising the combination of two pairs of carbonl1o1ders, a single electric regulator to move the two pairs of carbonholders relatively toward each other, and means controlled by theregulator for shifting one or more of the carbon holders after two ofthe carbon holders have been brought into the closest position, wherebythe second set of carbon holders of the two pairs of holders may bringits carbons into operative position.

Referring to the drawings: Figure 1 is a sectional elevation of an arclamp embodying my invention. Fig. 2 is a cross section on line ccx. Fig.3 is a sectional plan view at or about the letter B in Fig. 1; and Fig.4: is a perspective view illustrating the relative positions of thecarbons and their holders.

A is the frame of the lamp containing the regulator.

B is a vertically movable carbon holding rod provided at its lower endwith a carbon holder C having two independent clamps 0 arranged at anangle to each other with respect to the carbon holder rod B, as is veryclearly shown in Figs. 3 and 4. The carbons 1 and 2 are thus supportedat a suitable distance apart so that the carbon 2 does not obstruct muchlight during the consumption of carbons 1,1. It will be noticed thatthese carbons 1 and 2 carried by the rod B move verticallysimultaneously and to the same extent. As the rod 13 is fed downward forthe consumption of the carbons 1, the carbon 2 carried by the holder Cpasses through an aperture D in the base frame D to permit completeconsumption of the carbons 1.

The base plate D is secured to the rods E, E fastened in any suitablemanner to the frame A, and is provided with clamps d, d for the lowercarbons so located that the upper carbon 1 may operate in alignment withthe lower carbon 1, and the upper carbon 2 be out of alignment with thelower carbon 2 during the consumption of the carbons 1,1 and then uponraising the rod B and rotating it, the movable carbon 2 may be broughtinto alignment with the stationary lower carbon 2 and the remainder ofthe upper movable carbon 1 thrown out of alignment with the remainder ofthe lower carbon 1. The rod B may be fed downward by any suitableconstruotion of regulator, one type of which is shown in Fig. 1.Referring to this regulator, the perforated lifter f encircles the rod Band is moved vertically by a pivoted lever F having armatures adapted tothe magnets 11 and G. The magnet II is a high resistance magnet woundwith a shunt coil connecting with the terminals of the lamp, and themagnet G is a low resistance magnet having its coil in series With thecarbons. I/Vhen the lifter f strikes the shoulder I, the carbon rod B isliberated and falls, and when the rod B is moved upward the lifter f hasits free end brought in contact with the bracket iand is thus held inposition to permit easy upward movement of the rod B. The upper end ofthe rod B is provided with a head J having a heel L, a guide finger janda shoulder K. The interior of the tube M upon the upper part of the caseA is provided with two vertical grooves N and 0 connected at the top byan oblique groove 92. In these grooves the guide finger j moves. It willnow he observed that if the rod were lowered and was then raised to itsfull extent and then liberated it would be thrown a part of a revolution(in the construction shown, a quarter of a revolution) and then causedto descend in its newly adjusted position. In the first case the carbons1, 1, would be kept in alignment, and in the second case the carbons 2,2 would be kept in alignment.

Arranged in the upper part of the tube M is a cylinder I? provided witha coiled spring P adapted to cause it to wind upon itself a lifting cord19 having one end connected to the cylinder and at the other end to aslide Q guided in any suitable manner upon the interior of the tube M.The guide may be formed as indicated at m in Fig. 2. Pivoted to thelower part of the tube M is a lever R having an inclined face 1" andheld bya suitable spring, or if desired, by its own weight. This lever Rcatches upon the slide Q and holds it in its lowermost position.

The lamp being set for operation is as indicated in Fig. 1. As thecarbons 1, 1 are consumed, the rod B descends, and when the carbons arefully consumed, the shoulder K strikes the part 0 of the lever R andtrips the slide Q. The spring P then comes into play and through thecylinder P and cord p lifts the slide Q, and this pressing upon the heelL raises the carbon holding rod B. \Vhen the fingerj reaches the obliquegroove a the rod is turned, and when the said finger is brought over thevertical groove 0 and the carbons 2, 2, brought into alignment, the heelI. will have turned off of the slide Q and the carbon rod B falls ashort distance to bring the two carbons 2, 2 into operative position andthe lamp continues to burn. On resetting the lamp, the rod B is moved upto its fullest extent. The slide W is then pulled down bringing theslide Q approximately to the position of the dotted lines az-w. The rodB is then turned to bring the finger j into the groove N and this actionthrows the heel L over the slide Q, and in lowering the rod B the slideQ is drawn down until it is caught upon the arm R. The rod B is thenlifted to the position shown in Fig. l and new carbons inserted. As theshoulder K would trip the arm R the instant the rod B was lowered to thefull extent and thus permit the slide Q to be drawn up again, I providea small spring catch 75 which is temporarily pushed inward when the rodB is drawn down so that the slide Q is held against rising when the rodB is pushed upward to the position shown in Fig. 1. As soon as the rod Bis raised to the smallest extent the arm R catches the slide Q and thepressure on the spring catch may be removed.

S is the globe and is secured to a frame T guided upon the rods E, E,and adjusted in position by clamping screws 15. The lower part of theglobe is provided with a cup U which collects the ashes and refuse fromthe burning carbons. When the lamp is being trimmed the globe may belowered upon the rods E, E.

I do not confine myself to the details of construction herein set outfor resetting the carbon rod for the purpose of bringing the second pairof carbons into the alignment, as it is quite evident that the sameoperation may be performed in a variety of ways.

\Vhat I claim as new, and desire to secure by Letters Patent, is-

1. In an arc lamp, the combination of two carbon holders to support oneof each set of carbons, a vertically movable holder provided with twocarbon holder clamps arranged at a different distance apart than the twofirst mentioned carbon holders, electrically actuated feeding devicesfor feeding the movable holder, power devices for raising the movablecarbon holder clamps after the same have been fully lowered, and meansto shift the said movable carbon holder clamps whereby one pair ofcarbons shall be brought into line and after being consumed the carbonsof the other pair brought into line.

2. In an electric lamp, the combination of two stationary carbonholders, two vertically and laterally movable carbon holders adapted tobe brought successively over the respective stationary carbon holderselectrically actuated feeding mechanism to feed the movable carbonholders toward the stationary carbon holders, power devices for raisingthe movable carbon holders after being fully lowered, mechanical devicesfor moving the movable carbon holders laterally upon being raised, andan automatic trip device for throwing the power devices into actionafter the carbon holders have been fully lowered.

In an electric lamp, the combination of two stationary carbon holders,two vertically and laterally movable carbon holders adapted to bebrought successively over the respective stationary carbon holders,electrically actuated feeding mechanism to feed the movable carbonholders toward the stationary car IIO bon holders, power devices forraising the movable carbon holders after being fully lowered, mechanicaldevices for moving the movable carbon holders laterally upon beingraised, an automatic trip device for throwing the power devices intoaction after the carbon holders have been fully lowered, and means fordisengaging the power devices from the movable carbon holders after thesame have been fully raised.

4. In an electric lamp, the combination of two fixed carbon holders, avertically movable rod, two movable carbon holders carried by the rodand arranged at a different distance apart than the two stationarycarbon holders, feeding devices for feeding the vertically movable rodto compensate for the consumption of the carbons,guiding devices forcausing the rod to be turned through aportion of a revolution upon beingfully raised, power devices for raising the carbon rod, and alockingdevice for holding the power devices out of action until the rod isfully lowered, whereby the two sets of carbons carried by the holdersare successively consumed under the action of a single regulator orfeeding device.

5. In an electric lamp, the combination of two fixed carbon holders, avertically movable rod, two movable carbon holders carried by the rodand arranged at a different distance apart than the two stationarycarbon holders, feeding devices for feeding the vertically movable rodto compensate for the consumption of the carbons, guiding devices forcausing the rod to be turned through a portion of a revolution uponbeing fully raised, power devices for raising the carbon rod, a lockingdevice for holding the power devices out of ac tion until the rod isfully lowered, and a trip for releasing the rod from the power devicesafter being fully raised whereby itis free to be fed downward by theelectric regulator or feeding device.

6. In an electric lamp, the combination of two independent carbon holderframes, each of which is provided with two carbon holders but arrangedat different distances apart, electrically actuated feeding devices forcausing a relative movement between the carbon holder frames to maintainthe arc during the consumption of the carbons, and mechanical devicesfor automatically shifting the position of one of the carbon holderframes relatively to the other, whereby after the consumption stationarycarbon holders, two movable carbon holders, a single electricallyactuated regulator or feeding device to simultaneously feed the twomovable carbon holders toward the stationary carbon holders, andmechanical means for automatically moving one of the movable carbonholders to throw its carbon into alignment with the correspondin gcarbon of the stationary carbon holders, whereby with a single feedingmechanism or regulator two pairs of carbons may be successively burned.

S. In an arc lamp, the combination of two fixed carbon holders, avertically movable and rotatable rod carrying two movable carbon'holders, feeding devices for feeding the said rod vertically, andmechanical devices for rotating the rod upon raising it, whereby the twosets of carbons may be successivelyburned and regulated byasingleregulator and feeding device.

9. In an arc lamp, the combination of a pair of vertically movablecarbon holders,a single electric regulator to feed said carbon holders,a second pair of carbon holders adapted to operate in connection withthe first mentioned pair of carbon holders, and means controlled by theregulator for shifting the carbon hold ers of the two pairs relativelyso'as to bring one holder of each pair successively into operativeposition, wherebyone pair of carbons is consumed and then a second pairis brought into position to maintain the are.

10. In an arc lamp, the combination of two pairs of carbon holders, asingle electric regulator to move the two pairs of carbon holdersrelatively toward each other, and means controlled by the regulator forshifting one or more of the carbon holders after two of the carbonholders have been brought into the closest position, whereby the secondset of carbon holders of the two pairs of holders may bring theircarbonsinto operative position.

In testimony of which invention I have hereunto set my hand,

R. M. HUNTER.

Witnesses:

ERNEs'r HOWARD HUNTER, HELEN L. Mo'rHERwELL.

